Automatic toilet flushing device

Abstract

YAn improved automatic flushing device for valve actuated toilets that is capable of being housed inside the toilet's water tank, out of the user's sight. The conventional water supply valve system is not altered and the flush valve assembly is actuated through floating means arranged in such a way that, depending on the water levels inside the tank, will urge the opening of the flush valve. When enough water has been drained out, the action of the floating means ceases and a tripping mechanism engages locking the floating means thereby preventing it from opening the flush valve again until the tripping mechanism is triggered in response to the users removing his or her weight from the toilet seat.

What is claimed is: 
     
       1. An automatic flushing device for toilets having a flush valve operable for releasing water from a flush tank to a toilet bowl provided with a seat hinged upon the bowl for pivotal movement around a horizontal axis at the rearward end of the seat, said device comprising, in operative combination: a. an elongated arm secured to said seat and extending rearwardly underneath said flush tank;   b. means for reciprocating pivotal movements of said seat, and transmitted through said arm, along a vertical axis;   c. means for spring biasing said means for reciprocating pivotal movements of said seat so as to urge said arm slightly downwardly thereby lifting said seat slightly from said bowl;   d. floating means for actuating said flush valve within predetermined water levels in said tank;   e. tripping means disposed so as to prevent said floating means from actuating said flush valve and responsive to the relative positions of said means for reciprocating for triggering its tripping function and wherein said tripping means includes an actuating link having a cam termination in cooperation with said means for reciprocating the pivotal movements of said seat and a shoe member hingedly connected to said actuating link and adapted to prevent the actuation of said flush valve by said floating means until said tripping means is actuated.   
     
     
       2. The device set forth in claim 1 wherein said floating means include a rigid lever that is pivoted on one end at a fixed point with respect to said tank and chain means attached to the other end and said chain being connected to said flush valve assembly and adapted to actuate it.